/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.proyecto.iu;




import javax.servlet.http.*;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.proyecto.bl.Usuario;
import com.proyecto.bl.Service;
import com.google.gson.Gson;
/**
 *
 * @author BlueDeep
 */
@WebServlet(name = "LoginServlet", urlPatterns = {"/LoginServlet"})
public class LoginServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String identificacion = " ";
        String clave= " ";
        int opc = 0;
        Usuario usuario;
        String error = null;
        HttpSession s = null;
        
            try {
                identificacion = request.getParameter("p1");
                clave = request.getParameter("p2");
                opc = Integer.parseInt(request.getParameter("p3"));
                Gson gSon = new Gson();
                PrintWriter out = response.getWriter();
                String jSon = "";
                switch(opc){
                    case 1:
                        usuario = loguearse(identificacion, clave);
                            if (usuario.getIdUsuario()==null){
                                jSon = null;
                                usuario = null;
                            }else{
                                jSon = gSon.toJson(usuario);
                            }

                            s = request.getSession(true);
                            s.setAttribute("usuario", usuario);
                            out.println(jSon);
                        
                        break;
                    case 2:


                            s = request.getSession();
                            jSon = gSon.toJson(s.getAttribute("usuario"));
                            out.println(jSon);
                        break;
                case 3:
                        s = request.getSession(true);
                        s.invalidate();
                       
                        break;
                default: 
                    break;
                }
            } 

            catch (Exception e) {
                error = "Usuario no existe o clave incorrecta!!!!";
                request.setAttribute("error", error);
                request.getRequestDispatcher("/index.jsp").forward(request, response);
            }
    }

    private Usuario loguearse(String identificacion, String clave) throws Exception {
        Usuario usuario;
        usuario = new Usuario();
        usuario.setIdUsuario(identificacion);
        usuario.setPassword(clave);
        Service.usuarioConsultar(usuario);
        return usuario;
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}

